Western integrated oil majors posted a mixed set of first-quarter earnings results, with most continuing to grow production and some proving resilient to the impact of lower oil and gas prices and weaker refining margins.  In an earnings season overshadowed by a multi-billion-dollar bidding war for US independent Anadarko , the sector failed to match its recent run of bullish cash flow and earnings growth. But profits from trading oil and gas helped pull European majors above the pack during a quarter that average Brent prices were 5% lower on the year at $63.83/b. Total and Chevron led the pack in terms of production growth, posting year-on-year volume rises of 9% and 6.5%, respectively, as new projects […]